OK, let's crack this. We're given 665 and our task is to multiply it by 498. Essentially, we'll be adding 665 to itself 498 times.
Step 1: 0 + 665 = 665
Step 2: 665 + 665 = 1330
Step 3: 1330 + 665 = 1995
Step 4: 1995 + 665 = 2660
Step 5: 2660 + 665 = 3325
Step 6: 3325 + 665 = 3990
Step 7: 3990 + 665 = 4655
Step 8: 4655 + 665 = 5320
Step 9: 5320 + 665 = 5985
Step 10: 5985 + 665 = 6650
Step 11: 6650 + 665 = 7315
Step 12: 7315 + 665 = 7980
Step 13: 7980 + 665 = 8645
Step 14: 8645 + 665 = 9310
Step 15: 9310 + 665 = 9975
Step 16: 9975 + 665 = 10640
Step 17: 10640 + 665 = 11305
Step 18: 11305 + 665 = 11970
Step 19: 11970 + 665 = 12635
Step 20: 12635 + 665 = 13300
Step 21: 13300 + 665 = 13965
Step 22: 13965 + 665 = 14630
Step 23: 14630 + 665 = 15295
Step 24: 15295 + 665 = 15960
Step 25: 15960 + 665 = 16625
Step 26: 16625 + 665 = 17290
Step 27: 17290 + 665 = 17955
Step 28: 17955 + 665 = 18620
Step 29: 18620 + 665 = 19285
Step 30: 19285 + 665 = 19950
Step 31: 19950 + 665 = 20615
Step 32: 20615 + 665 = 21280
Step 33: 21280 + 665 = 21945
Step 34: 21945 + 665 = 22610
Step 35: 22610 + 665 = 23275
Step 36: 23275 + 665 = 23940
Step 37: 23940 + 665 = 24605
Step 38: 24605 + 665 = 25270
Step 39: 25270 + 665 = 25935
Step 40: 25935 + 665 = 26600
Step 41: 26600 + 665 = 27265
Step 42: 27265 + 665 = 27930
Step 43: 27930 + 665 = 28595
Step 44: 28595 + 665 = 29260
Step 45: 29260 + 665 = 29925
Step 46: 29925 + 665 = 30590
Step 47: 30590 + 665 = 31255
Step 48: 31255 + 665 = 31920
Step 49: 31920 + 665 = 32585
Step 50: 32585 + 665 = 33250
Step 51: 33250 + 665 = 33915
Step 52: 33915 + 665 = 34580
Step 53: 34580 + 665 = 35245
Step 54: 35245 + 665 = 35910
Step 55: 35910 + 665 = 36575
Step 56: 36575 + 665 = 37240
Step 57: 37240 + 665 = 37905
Step 58: 37905 + 665 = 38570
Step 59: 38570 + 665 = 39235
Step 60: 39235 + 665 = 39900
Step 61: 39900 + 665 = 40565
Step 62: 40565 + 665 = 41230
Step 63: 41230 + 665 = 41895
Step 64: 41895 + 665 = 42560
Step 65: 42560 + 665 = 43225
Step 66: 43225 + 665 = 43890
Step 67: 43890 + 665 = 44555
Step 68: 44555 + 665 = 45220
Step 69: 45220 + 665 = 45885
Step 70: 45885 + 665 = 46550
Step 71: 46550 + 665 = 47215
Step 72: 47215 + 665 = 47880
Step 73: 47880 + 665 = 48545
Step 74: 48545 + 665 = 49210
Step 75: 49210 + 665 = 49875
Step 76: 49875 + 665 = 50540
Step 77: 50540 + 665 = 51205
Step 78: 51205 + 665 = 51870
Step 79: 51870 + 665 = 52535
Step 80: 52535 + 665 = 53200
Step 81: 53200 + 665 = 53865
Step 82: 53865 + 665 = 54530
Step 83: 54530 + 665 = 55195
Step 84: 55195 + 665 = 55860
Step 85: 55860 + 665 = 56525
Step 86: 56525 + 665 = 57190
Step 87: 57190 + 665 = 57855
Step 88: 57855 + 665 = 58520
Step 89: 58520 + 665 = 59185
Step 90: 59185 + 665 = 59850
Step 91: 59850 + 665 = 60515
Step 92: 60515 + 665 = 61180
Step 93: 61180 + 665 = 61845
Step 94: 61845 + 665 = 62510
Step 95: 62510 + 665 = 63175
Step 96: 63175 + 665 = 63840
Step 97: 63840 + 665 = 64505
Step 98: 64505 + 665 = 65170
Step 99: 65170 + 665 = 65835
Step 100: 65835 + 665 = 66500
Step 101: 66500 + 665 = 67165
Step 102: 67165 + 665 = 67830
Step 103: 67830 + 665 = 68495
Step 104: 68495 + 665 = 69160
Step 105: 69160 + 665 = 69825
Step 106: 69825 + 665 = 70490
Step 107: 70490 + 665 = 71155
Step 108: 71155 + 665 = 71820
Step 109: 71820 + 665 = 72485
Step 110: 72485 + 665 = 73150
Step 111: 73150 + 665 = 73815
Step 112: 73815 + 665 = 74480
Step 113: 74480 + 665 = 75145
Step 114: 75145 + 665 = 75810
Step 115: 75810 + 665 = 76475
Step 116: 76475 + 665 = 77140
Step 117: 77140 + 665 = 77805
Step 118: 77805 + 665 = 78470
Step 119: 78470 + 665 = 79135
Step 120: 79135 + 665 = 79800
Step 121: 79800 + 665 = 80465
Step 122: 80465 + 665 = 81130
Step 123: 81130 + 665 = 81795
Step 124: 81795 + 665 = 82460
Step 125: 82460 + 665 = 83125
Step 126: 83125 + 665 = 83790
Step 127: 83790 + 665 = 84455
Step 128: 84455 + 665 = 85120
Step 129: 85120 + 665 = 85785
Step 130: 85785 + 665 = 86450
Step 131: 86450 + 665 = 87115
Step 132: 87115 + 665 = 87780
Step 133: 87780 + 665 = 88445
Step 134: 88445 + 665 = 89110
Step 135: 89110 + 665 = 89775
Step 136: 89775 + 665 = 90440
Step 137: 90440 + 665 = 91105
Step 138: 91105 + 665 = 91770
Step 139: 91770 + 665 = 92435
Step 140: 92435 + 665 = 93100
Step 141: 93100 + 665 = 93765
Step 142: 93765 + 665 = 94430
Step 143: 94430 + 665 = 95095
Step 144: 95095 + 665 = 95760
Step 145: 95760 + 665 = 96425
Step 146: 96425 + 665 = 97090
Step 147: 97090 + 665 = 97755
Step 148: 97755 + 665 = 98420
Step 149: 98420 + 665 = 99085
Step 150: 99085 + 665 = 99750
Step 151: 99750 + 665 = 100415
Step 152: 100415 + 665 = 101080
Step 153: 101080 + 665 = 101745
Step 154: 101745 + 665 = 102410
Step 155: 102410 + 665 = 103075
Step 156: 103075 + 665 = 103740
Step 157: 103740 + 665 = 104405
Step 158: 104405 + 665 = 105070
Step 159: 105070 + 665 = 105735
Step 160: 105735 + 665 = 106400
Step 161: 106400 + 665 = 107065
Step 162: 107065 + 665 = 107730
Step 163: 107730 + 665 = 108395
Step 164: 108395 + 665 = 109060
Step 165: 109060 + 665 = 109725
Step 166: 109725 + 665 = 110390
Step 167: 110390 + 665 = 111055
Step 168: 111055 + 665 = 111720
Step 169: 111720 + 665 = 112385
Step 170: 112385 + 665 = 113050
Step 171: 113050 + 665 = 113715
Step 172: 113715 + 665 = 114380
Step 173: 114380 + 665 = 115045
Step 174: 115045 + 665 = 115710
Step 175: 115710 + 665 = 116375
Step 176: 116375 + 665 = 117040
Step 177: 117040 + 665 = 117705
Step 178: 117705 + 665 = 118370
Step 179: 118370 + 665 = 119035
Step 180: 119035 + 665 = 119700
Step 181: 119700 + 665 = 120365
Step 182: 120365 + 665 = 121030
Step 183: 121030 + 665 = 121695
Step 184: 121695 + 665 = 122360
Step 185: 122360 + 665 = 123025
Step 186: 123025 + 665 = 123690
Step 187: 123690 + 665 = 124355
Step 188: 124355 + 665 = 125020
Step 189: 125020 + 665 = 125685
Step 190: 125685 + 665 = 126350
Step 191: 126350 + 665 = 127015
Step 192: 127015 + 665 = 127680
Step 193: 127680 + 665 = 128345
Step 194: 128345 + 665 = 129010
Step 195: 129010 + 665 = 129675
Step 196: 129675 + 665 = 130340
Step 197: 130340 + 665 = 131005
Step 198: 131005 + 665 = 131670
Step 199: 131670 + 665 = 132335
Step 200: 132335 + 665 = 133000
Step 201: 133000 + 665 = 133665
Step 202: 133665 + 665 = 134330
Step 203: 134330 + 665 = 134995
Step 204: 134995 + 665 = 135660
Step 205: 135660 + 665 = 136325
Step 206: 136325 + 665 = 136990
Step 207: 136990 + 665 = 137655
Step 208: 137655 + 665 = 138320
Step 209: 138320 + 665 = 138985
Step 210: 138985 + 665 = 139650
Step 211: 139650 + 665 = 140315
Step 212: 140315 + 665 = 140980
Step 213: 140980 + 665 = 141645
Step 214: 141645 + 665 = 142310
Step 215: 142310 + 665 = 142975
Step 216: 142975 + 665 = 143640
Step 217: 143640 + 665 = 144305
Step 218: 144305 + 665 = 144970
Step 219: 144970 + 665 = 145635
Step 220: 145635 + 665 = 146300
Step 221: 146300 + 665 = 146965
Step 222: 146965 + 665 = 147630
Step 223: 147630 + 665 = 148295
Step 224: 148295 + 665 = 148960
Step 225: 148960 + 665 = 149625
Step 226: 149625 + 665 = 150290
Step 227: 150290 + 665 = 150955
Step 228: 150955 + 665 = 151620
Step 229: 151620 + 665 = 152285
Step 230: 152285 + 665 = 152950
Step 231: 152950 + 665 = 153615
Step 232: 153615 + 665 = 154280
Step 233: 154280 + 665 = 154945
Step 234: 154945 + 665 = 155610
Step 235: 155610 + 665 = 156275
Step 236: 156275 + 665 = 156940
Step 237: 156940 + 665 = 157605
Step 238: 157605 + 665 = 158270
Step 239: 158270 + 665 = 158935
Step 240: 158935 + 665 = 159600
Step 241: 159600 + 665 = 160265
Step 242: 160265 + 665 = 160930
Step 243: 160930 + 665 = 161595
Step 244: 161595 + 665 = 162260
Step 245: 162260 + 665 = 162925
Step 246: 162925 + 665 = 163590
Step 247: 163590 + 665 = 164255
Step 248: 164255 + 665 = 164920
Step 249: 164920 + 665 = 165585
Step 250: 165585 + 665 = 166250
Step 251: 166250 + 665 = 166915
Step 252: 166915 + 665 = 167580
Step 253: 167580 + 665 = 168245
Step 254: 168245 + 665 = 168910
Step 255: 168910 + 665 = 169575
Step 256: 169575 + 665 = 170240
Step 257: 170240 + 665 = 170905
Step 258: 170905 + 665 = 171570
Step 259: 171570 + 665 = 172235
Step 260: 172235 + 665 = 172900
Step 261: 172900 + 665 = 173565
Step 262: 173565 + 665 = 174230
Step 263: 174230 + 665 = 174895
Step 264: 174895 + 665 = 175560
Step 265: 175560 + 665 = 176225
Step 266: 176225 + 665 = 176890
Step 267: 176890 + 665 = 177555
Step 268: 177555 + 665 = 178220
Step 269: 178220 + 665 = 178885
Step 270: 178885 + 665 = 179550
Step 271: 179550 + 665 = 180215
Step 272: 180215 + 665 = 180880
Step 273: 180880 + 665 = 181545
Step 274: 181545 + 665 = 182210
Step 275: 182210 + 665 = 182875
Step 276: 182875 + 665 = 183540
Step 277: 183540 + 665 = 184205
Step 278: 184205 + 665 = 184870
Step 279: 184870 + 665 = 185535
Step 280: 185535 + 665 = 186200
Step 281: 186200 + 665 = 186865
Step 282: 186865 + 665 = 187530
Step 283: 187530 + 665 = 188195
Step 284: 188195 + 665 = 188860
Step 285: 188860 + 665 = 189525
Step 286: 189525 + 665 = 190190
Step 287: 190190 + 665 = 190855
Step 288: 190855 + 665 = 191520
Step 289: 191520 + 665 = 192185
Step 290: 192185 + 665 = 192850
Step 291: 192850 + 665 = 193515
Step 292: 193515 + 665 = 194180
Step 293: 194180 + 665 = 194845
Step 294: 194845 + 665 = 195510
Step 295: 195510 + 665 = 196175
Step 296: 196175 + 665 = 196840
Step 297: 196840 + 665 = 197505
Step 298: 197505 + 665 = 198170
Step 299: 198170 + 665 = 198835
Step 300: 198835 + 665 = 199500
Step 301: 199500 + 665 = 200165
Step 302: 200165 + 665 = 200830
Step 303: 200830 + 665 = 201495
Step 304: 201495 + 665 = 202160
Step 305: 202160 + 665 = 202825
Step 306: 202825 + 665 = 203490
Step 307: 203490 + 665 = 204155
Step 308: 204155 + 665 = 204820
Step 309: 204820 + 665 = 205485
Step 310: 205485 + 665 = 206150
Step 311: 206150 + 665 = 206815
Step 312: 206815 + 665 = 207480
Step 313: 207480 + 665 = 208145
Step 314: 208145 + 665 = 208810
Step 315: 208810 + 665 = 209475
Step 316: 209475 + 665 = 210140
Step 317: 210140 + 665 = 210805
Step 318: 210805 + 665 = 211470
Step 319: 211470 + 665 = 212135
Step 320: 212135 + 665 = 212800
Step 321: 212800 + 665 = 213465
Step 322: 213465 + 665 = 214130
Step 323: 214130 + 665 = 214795
Step 324: 214795 + 665 = 215460
Step 325: 215460 + 665 = 216125
Step 326: 216125 + 665 = 216790
Step 327: 216790 + 665 = 217455
Step 328: 217455 + 665 = 218120
Step 329: 218120 + 665 = 218785
Step 330: 218785 + 665 = 219450
Step 331: 219450 + 665 = 220115
Step 332: 220115 + 665 = 220780
Step 333: 220780 + 665 = 221445
Step 334: 221445 + 665 = 222110
Step 335: 222110 + 665 = 222775
Step 336: 222775 + 665 = 223440
Step 337: 223440 + 665 = 224105
Step 338: 224105 + 665 = 224770
Step 339: 224770 + 665 = 225435
Step 340: 225435 + 665 = 226100
Step 341: 226100 + 665 = 226765
Step 342: 226765 + 665 = 227430
Step 343: 227430 + 665 = 228095
Step 344: 228095 + 665 = 228760
Step 345: 228760 + 665 = 229425
Step 346: 229425 + 665 = 230090
Step 347: 230090 + 665 = 230755
Step 348: 230755 + 665 = 231420
Step 349: 231420 + 665 = 232085
Step 350: 232085 + 665 = 232750
Step 351: 232750 + 665 = 233415
Step 352: 233415 + 665 = 234080
Step 353: 234080 + 665 = 234745
Step 354: 234745 + 665 = 235410
Step 355: 235410 + 665 = 236075
Step 356: 236075 + 665 = 236740
Step 357: 236740 + 665 = 237405
Step 358: 237405 + 665 = 238070
Step 359: 238070 + 665 = 238735
Step 360: 238735 + 665 = 239400
Step 361: 239400 + 665 = 240065
Step 362: 240065 + 665 = 240730
Step 363: 240730 + 665 = 241395
Step 364: 241395 + 665 = 242060
Step 365: 242060 + 665 = 242725
Step 366: 242725 + 665 = 243390
Step 367: 243390 + 665 = 244055
Step 368: 244055 + 665 = 244720
Step 369: 244720 + 665 = 245385
Step 370: 245385 + 665 = 246050
Step 371: 246050 + 665 = 246715
Step 372: 246715 + 665 = 247380
Step 373: 247380 + 665 = 248045
Step 374: 248045 + 665 = 248710
Step 375: 248710 + 665 = 249375
Step 376: 249375 + 665 = 250040
Step 377: 250040 + 665 = 250705
Step 378: 250705 + 665 = 251370
Step 379: 251370 + 665 = 252035
Step 380: 252035 + 665 = 252700
Step 381: 252700 + 665 = 253365
Step 382: 253365 + 665 = 254030
Step 383: 254030 + 665 = 254695
Step 384: 254695 + 665 = 255360
Step 385: 255360 + 665 = 256025
Step 386: 256025 + 665 = 256690
Step 387: 256690 + 665 = 257355
Step 388: 257355 + 665 = 258020
Step 389: 258020 + 665 = 258685
Step 390: 258685 + 665 = 259350
Step 391: 259350 + 665 = 260015
Step 392: 260015 + 665 = 260680
Step 393: 260680 + 665 = 261345
Step 394: 261345 + 665 = 262010
Step 395: 262010 + 665 = 262675
Step 396: 262675 + 665 = 263340
Step 397: 263340 + 665 = 264005
Step 398: 264005 + 665 = 264670
Step 399: 264670 + 665 = 265335
Step 400: 265335 + 665 = 266000
Step 401: 266000 + 665 = 266665
Step 402: 266665 + 665 = 267330
Step 403: 267330 + 665 = 267995
Step 404: 267995 + 665 = 268660
Step 405: 268660 + 665 = 269325
Step 406: 269325 + 665 = 269990
Step 407: 269990 + 665 = 270655
Step 408: 270655 + 665 = 271320
Step 409: 271320 + 665 = 271985
Step 410: 271985 + 665 = 272650
Step 411: 272650 + 665 = 273315
Step 412: 273315 + 665 = 273980
Step 413: 273980 + 665 = 274645
Step 414: 274645 + 665 = 275310
Step 415: 275310 + 665 = 275975
Step 416: 275975 + 665 = 276640
Step 417: 276640 + 665 = 277305
Step 418: 277305 + 665 = 277970
Step 419: 277970 + 665 = 278635
Step 420: 278635 + 665 = 279300
Step 421: 279300 + 665 = 279965
Step 422: 279965 + 665 = 280630
Step 423: 280630 + 665 = 281295
Step 424: 281295 + 665 = 281960
Step 425: 281960 + 665 = 282625
Step 426: 282625 + 665 = 283290
Step 427: 283290 + 665 = 283955
Step 428: 283955 + 665 = 284620
Step 429: 284620 + 665 = 285285
Step 430: 285285 + 665 = 285950
Step 431: 285950 + 665 = 286615
Step 432: 286615 + 665 = 287280
Step 433: 287280 + 665 = 287945
Step 434: 287945 + 665 = 288610
Step 435: 288610 + 665 = 289275
Step 436: 289275 + 665 = 289940
Step 437: 289940 + 665 = 290605
Step 438: 290605 + 665 = 291270
Step 439: 291270 + 665 = 291935
Step 440: 291935 + 665 = 292600
Step 441: 292600 + 665 = 293265
Step 442: 293265 + 665 = 293930
Step 443: 293930 + 665 = 294595
Step 444: 294595 + 665 = 295260
Step 445: 295260 + 665 = 295925
Step 446: 295925 + 665 = 296590
Step 447: 296590 + 665 = 297255
Step 448: 297255 + 665 = 297920
Step 449: 297920 + 665 = 298585
Step 450: 298585 + 665 = 299250
Step 451: 299250 + 665 = 299915
Step 452: 299915 + 665 = 300580
Step 453: 300580 + 665 = 301245
Step 454: 301245 + 665 = 301910
Step 455: 301910 + 665 = 302575
Step 456: 302575 + 665 = 303240
Step 457: 303240 + 665 = 303905
Step 458: 303905 + 665 = 304570
Step 459: 304570 + 665 = 305235
Step 460: 305235 + 665 = 305900
Step 461: 305900 + 665 = 306565
Step 462: 306565 + 665 = 307230
Step 463: 307230 + 665 = 307895
Step 464: 307895 + 665 = 308560
Step 465: 308560 + 665 = 309225
Step 466: 309225 + 665 = 309890
Step 467: 309890 + 665 = 310555
Step 468: 310555 + 665 = 311220
Step 469: 311220 + 665 = 311885
Step 470: 311885 + 665 = 312550
Step 471: 312550 + 665 = 313215
Step 472: 313215 + 665 = 313880
Step 473: 313880 + 665 = 314545
Step 474: 314545 + 665 = 315210
Step 475: 315210 + 665 = 315875
Step 476: 315875 + 665 = 316540
Step 477: 316540 + 665 = 317205
Step 478: 317205 + 665 = 317870
Step 479: 317870 + 665 = 318535
Step 480: 318535 + 665 = 319200
Step 481: 319200 + 665 = 319865
Step 482: 319865 + 665 = 320530
Step 483: 320530 + 665 = 321195
Step 484: 321195 + 665 = 321860
Step 485: 321860 + 665 = 322525
Step 486: 322525 + 665 = 323190
Step 487: 323190 + 665 = 323855
Step 488: 323855 + 665 = 324520
Step 489: 324520 + 665 = 325185
Step 490: 325185 + 665 = 325850
Step 491: 325850 + 665 = 326515
Step 492: 326515 + 665 = 327180
Step 493: 327180 + 665 = 327845
Step 494: 327845 + 665 = 328510
Step 495: 328510 + 665 = 329175
Step 496: 329175 + 665 = 329840
Step 497: 329840 + 665 = 330505
Step 498: 330505 + 665 = 331170

So, 665*498 = 331170